11B may refer to: WASP-11b, an extrasolar planet discovered in 2008 GCR Class 11B, a class of British 4-4-0 steam locomotive Ontario Highway 11B New Hampshire Route 11B New York State Route 11B 802.11b, an IEEE standard for wireless networking Boron-11 (11B), an isotope of boron The U.S. Army Military Occupational Specialty code for an enlisted infantry soldier – phonetically pronounced "Eleven Bravo" U.S. Federal Rule of Civil Procedure 11(b), providing for sanctions against attorneys who bring frivolous lawsuits
See also 11B-X-1371, an Internet viral video Stalag XI-B, a German Army POW camp near Fallingbostel B11 (disambiguation)